Stanford quarterback Keller Chryst (10) passes the ball against Utah in the first half during an NCAA college football game Saturday, Oct. 7, 2017, in Salt Lake City. (AP Photo/Rick Bowmer)(Photo: The Associated Press)

UT offensive coordinator Tyson Helton intends to install a pro-style system, and that's Chryst's background. He ran a pro-style scheme at Stanford and while at Palo Alto High School in California.

“He’s big, he’s smart, and his work ethic is beyond anybody that you can think of,” Earl Hansen, who was Chryst's coach at Palo Alto, told USA TODAY Network - Tennessee in January. "He’s prototype. If you look at him, he definitely passes the eyeball test.”

"He’s not a sports car. He’s a truck,” Hansen added of Chryst, who is listed at 6-foot-5, 234 pounds.

In high school, Chryst emerged as a four-star prospect. He threw 84 touchdowns in three seasons as Palo Alto’s starter.

Chryst will help restock Tennessee's quarterback depth chart after Quinten Dormady, who started five games in 2017, announced in January he was transferring.

Guarantano started seven games last season and completed 61.9 percent of his passes for 997 yards.

Chryst comes from a football pedigree. His father, Geep Chryst, is the Denver Broncos’ tight ends coach. His uncle, Paul Chryst, is the coach at Wisconsin. Another uncle, Rick Chryst, is the former commissioner of the Mid-American Conference.